Well bailer



Nov. 3, 1936. wfg, ERW|N ET AL 2,059,629

WELL BAILER Filed April 22, 1933 2 sheets-sheet 1 Nov. 3, 1936. w. c.ERWIN ET AL WELL BAILER Filed April 22, 1935 2 Sheets-Sheet 2 PatentedNov. 3, 1936 UNITED STATES BAILER Weldon o. Erwin and eeen msweet, Brea,cam., assign'ors to John Grant, Los Antelel ,-Cali!.v

Application Apru z2, 193s, serial No. 061,439

17 claims. (ci. res-19) This invention has to do generally withimprovements and features of construction applica.-

ble to tools or devices such as are used in cleaning Wells, and inaccordance with the broader princi- 5 ples of theinvention it isapplicable to well cleaners, such for example, as we set forth in ourcopending application entitled Well tool, Serial No. 648,072,filed'December 20, 1932, as well as to that type or form of toolordinarily termed 1o bailer." Throughout the following presentation ofour present invention, we will refer,to it as applied to or embodying abailer, it being understood that such reference Vis not to be construedaslirniting the scope or range of application of 15 the invention, butthat the invention is broadly applicabletowell tools, ,and particularlyballers/ tion to provide a well device of the character'A 3 mentioned inwhich the body or cavity of the device isvclosed by a-frangible closureor sealing A disc adapted to be operated or broken by a punch,

which punch is effective and dependable in operation, and is such thatit does not materially in- `j terfere with the free flow or entrance ofmaterial into the device when the closure is broken.

Another object of our invention is to provide a simple, practical andimproved construction to facilitate unloading or emptying of 'thedevice' o after it has been removed from the well. i

It is another objectvof our invention to provide a well tool of thecharacter described with a Alateral discharge openingclose to the lowerend of the material carrying chamber of the device, 45 which opening isprovided with an eiective cio'- sure that can be readily applied andremoved in s the course of handling o-r manipulating the tool.:

It is a further object of our invention to provide improvements in atool of 'the character 5U. mentioned by which the. plfessuresbetween theinterior and exteriorof; the tool aregoverned orI handled to make the.tool safe and simple and rapid to operate.l

A particular object of the present invention is to provide means inconnection with the body of atooi of the character described by whichpressure is admitted into the body above the material in the bodyas thematerial is unloaded or discharged from the` body in order to prevent anegative or reducedjpressure occurring in the body above the 5 materialbeing discharged, such as might retard or prevent the dischargeot-material from the body.

Another object of this invention is to-provide a novel andimprdved-means for mounting a clol0 'sure or sealing disc in a tool ofthe character mentioned. -By the present invention we provide amountingfor the closure disc by which it is possible for an operatorto quicklyand eiectively apply and remove a closure disc without 15 disassemblingor` otherwise manipulating the major or principal parts of the device. n

The various. objects and features of the present invention will be bestand more fully understood from the following detailed description of atypical -forml -and application of the invention, throughout whichdescription reference is had to the accompanying drawings showing theinvention applied to a well bailer, in which drawings:

Fig. 1 isa longitudinal detailed sectional view of the upper portion ofa bailer embodying features of the present invention.

Fig. 2 is a longitudinal detailed sectional view of the lower portion ofthe bailer showing fea tures provided by our present invention. Fig. 3is an enlarged detailed transverse sec- 3 tional view taken as indicatedby line 3 3 on Fig. 2.

Fig. 4 is an enlarged detailed transverse sectional view taken asindicated by line l--l on Fis. 2. 35

Fig. 5 is an enlarged detailed transverse sectional view taken asindicated by line 5-5 on Fig. 6 is an enlargedside elevation of a porotion of the tool, being a view taken substantially as indicated on line6--6 on Fig. 2.

Fig. '1 is a view of the parts shown on Fig. 6 taken as indicated byline 'l'| on Fig. 6.

The various features ot constructionfprovided .by our-presentinvention'aredisclos'ed inror as applied to a ,wellbailer adapted to be.run. or..

lowered 'into a we ll ,.to; remove` material .from the well. The present'invention relates vtojf'eatures applicable to a bailer, .wel1 cleanenorsimi-lartool, 50

in which the loading or action of the.toolis. et fected by the;hydrostatic Vheadv olf-fluid in the well.4 Ballers operated on thisprinciple are commonly termed vacuum type bailers". This type of bailer,or like tool. includes a body or chamber u member which is empty as thetool is lowered into the well, and is sealed to prevent fluid in thewell from entering it. When the tool has been lowered to the desiredpoint in the well, the seal or closure means is operated so that thehead of iiuid in the well, which is obviously much greater than thepressure of the air trapped in the tool when it was sealed at thesurface of the well, causes fluid or material in the well to rapidlyenter or fill into the tool until the internal and external pressuresequalize. By this action the tool is loaded or filled in the well at orunder the pressure existing in the well at the point the tool isoperated.

The bailer embodying the present invention and illustrated in theaccompanying drawings includes, generally, a body A, a closure means Bthat operates to close or seal the lower end of the body, means C foroperating or opening the closure, a check valve D for retaining materialin the body after it has entered the body, control means E in connectionwith the body to allow fluid to escape from the body so that excessivepressures do not occur within the body when the tool is removed from thewell, control means F for admitting pressure into the body as the bodyis being emptied to prevent a negative or reduced pressure fromdeveloping in the body. and various other features, the details andfunctions of which will be hereinafter described.

The body A is an elongate tubular element or structure forming acontainer or chamber adapted to receive material in a well, and to carryit out of the well. The body A further forms a carrying or mounting forthe various elements of the device, and thus becomes the principalelement of the tool. In the preferred form of construction the body issectional, for instance, it may be formed of a main section I0, a topsection I I applied to the upper end of the main section, and a bottomsection I2 applied to the lower end of the main section. The mainsection I0 of the body forms the principal material receiving chamber ofthe device, and in practice is a comparatively long tubular sectionformed of pipe or tubing sumciently heavy to withstand the pressuresunder which the tool has to operate.

The top section II of thebody is applied to the upper end of the mainsection Il to close it, and acts as a coupling or means for connectingthe device with an operating member such as a string of pipe or asuitable line. In the drawings we have shown the top section II screwthreaded to the upper end of the main section I0, and provided at itsupper end with atapered screw threaded pin projection I2 adapted toreceive a coupling, rope socket, or the like. In accordance with thepreferred form of the invention, the top section II is employed as amounting or carrier for the means E and F hereinafter described.

'I'he bottom section I2 of the body A is a tubular section connected tothe lower end of the main section I0 through a' suitable screw threadedconnection. The bottom section I2 in the construction illustratedcarries the check valve D, is provided witl'r a lateral dischargeopening I4 above the valve D, and is adapted to receive and carry themounting member I5 which supports the closure means B. The. section I2is a tubular part sutnciently long to accommodate the other parts abovementioned. The upper end of the section I2 is provided with a centralscrew threaded socket I6 that receives the threaded lower end of themain section I0 of the body.

An eccentric opening ITI extends downwardly through the section I2 fromthe socket I6 to the centrally located chamber I8, which accommodatesthe valve D. The opening I1 through the body section I2 being eccentricas clearly illustrated in Figs. 2, 3 and 7 of the drawings, provides athick wall portion I9 at one side of the body where the opening Ilextends through the body, providing stock or material to accommodate thedischarge opening I4 and its closure, as will be hereinafter described.

A reduced opening 20 continues downwardly from the lower end of thevalve chamber I8 tov the lower end of the body section I2. Thedifferential in size between the opening 20 and the valve chamber IBresults in the formation of a valve seat 2i facing upwardly in the bodysection I2 to receive the check valve D.' Check valve D is preferably aball valve adapted to cooperate with the seat 2| as illustrated in Fig.2 of the drawings. The valve is adapted to be lowered into position inthe chamber I8 through the opening I1, and is held against displacementfrom the chamber by a retaining bar 22 arranged through the upper endportion of the valve chamber, as shown throughout the drawings.

The discharge opening I4 provided by our invention extends laterallythrough the thickened or heavy wall portion I9 of the body section I2 tocommunicate with the opening I1. The opening I4 is preferably-made ofsubstantially the same diameter as the opening I1, as will be apparentfrom a consideration of the drawings. The closure 24 is provided tonormally close the discharge opening I4 and has a plug portion 25adapted to project into the opening I4, and a ange portion 26 presentinga face 21 that engages or abuts the flat face 28 provided at the outerend of the opening I4. 'I'he ange 26 has diametrically opposite earportions 30 adapted to engage under overhanging lugs 3i formed bytransversely notching the thickened wall portion I9 of the body sectionI2 immediately outward of the face 28, providing transverse ways 35 inFigs. 2 and 6 of the drawings. The outer end or exterior surface 38 ofthe closure 24 is shaped so that when the closure is in position withthe ears 30 held by the lugs 3i as shown in Figs. 2 and 6, it extendslongitudinally parallel with the exterior of the body section I2, and islaterally curved concentric with the outer surface of the body sectionI2, as clearly shown throughout the drawings. 'I'he outer portion of theclosure 24 that iits between the lugs 3i is turned concentric with theopening I4 to a size or diameter that will fit between the lugs 3| asshown in Fig. 6. This turned portion of the closure is designated bynumeral I1.

With the discharge opening and the closure therefor formed and relatedas just described and as shown throughout the drawings, the closure canbe arranged so that the plug portion 25 enters the opening I4 when theears 30 are in line transversely of the tool. From this position theclosure can be rotated to bring the ears Ill into position behind thelugs Il, in which position the closure is held against displacement fromthe body section I2. For the purpose of making the closure 24 tight, asuitable packing ring or gasket Il may be arranged in a suitable grooveprovided at the Junction of the plug portion 25 and the flange 20, andclamp screws I! may be provided in the lugs 3| to be tightened againstthe vflanges so that the closure is held tight against the iace 28.

l The mounting member I5 for the closure B is a tubular partprojectingdownwardly from the lower end of the body section I2 so that itI is ineffect a continuation of the body section I2. In the particularconstruction illustrated the part I5 is formed separate from the bodysection I2, and is attached thereto by a suitable threaded connection4I). An opening 4I extends longitudinallythrough the mounting member I5,and

has a portion 4I of reduced diameter at its upper end or immediatelyadjacent connection 48. A seat member or bushing 42 is mounted in -theupper end portion of the opening 4I to receive a closure disc 43. Inaccordance with the present invention, an opening 44 is formedtransversely through the mounting member I5 to intersect the opening 4Iaimmediately below the seat 42. The opening 44 is preferably rectangularin cross section with its major dimension transverse of the tool, andsomewhat greater than the diameter of the opening Illa. A disc carrier45 slidably fits the opening 44, and when in position in the opening 44its ends 45 are flush with and coincide with the curvature of theexterior of the member I5, as clearly shown in Fig. 4 ofthe drawings.

An opening 46-is formed vertically through the carrier to coincide withthe opening through the seat 42 when the carrier is in position in thetool as shown in Figs. 2 and 4 of the drawings. The closure disc 43,which maybe formed of any frangible material such as glass, bakelite, orother such composition or material, is mounted in the upper end of theopening 46, formed through the carrier 45, and is adapted to set againstthe bottom or lower end of the seat 42 when the tool is in operation orconditioned for lowering into a well. In the preferred construction theclosure disc 43 is made concavo-convex as shown in the drawings, and ismounted with its convex side facing downwardly. The carrier 43 may beset in position in the opening 44 in any suitable manner. For instance,a set screw 58 may be arranged in the member I5 transversely of theopening 44 to engage and set the carrier 45 as shown in Figs. 2, 4 and 7of the drawings.

'I'he means C for operating or opening the closure is carried by thelower portion o-f 'the mounting member I5 so that it is below theclosure disc 43. The closure 43 being in the nature of a frangible disc,the means C is in the nature of a punch adapted to engage or break thedisc. The punch, as shown throughout the drawings, includes a tubularstem 68 slidably tting the opening 4I in the mounting member I5, and ahead 8i on the upper end of the stem adapted to engage and to rupturethe disc 43. The head 6I is proportioned and shaped to effectively'fracture the disc 43, and is mounted or carried'on the upper end of thestem 68 through shapedI ribs 62, which leave openings 83 providing free'communication between the opening B4 through lthe stem 80, and theinterior of the member I5 above the punch.

In practice, the punch may be .retained in connection with the mountingmember I8 in any suitable manner, for instance, it may be connected tothe member I5 for suitable limited longitudinal movement relativethereto by a. pin 'I8 carried by member I5, and that the desiredmovement of the punch relative to the member I5 can be had by suitablyproportioned slots 1I. The lower end portion of the stem 88 is providedwith a foot portion 80, having a plurality of transverse openings 8|, aswell as a. central opening 82 extending through it and communicatingwith the opening 84 in the stem 60. The foot 80 is threaded to the lowerend of the stem 60, and a regulating sleeve 85 is retained between thefoot and the lower end portion of the stem, as clearly shown in Fig. 2of the drawings. 'Ihe sleeve-85 can be positioned so that the openings8| are open as shown throughout the drawings, or are restricted orclosed, as the operator desires. The lower end portion oi the mountingmember I5 may be provided with threads 86 to facilitate connecting thestructure with other parts or devices in the event that the device is tobe used in combination with a well cleaner or other like device.

The control E is provided to allow iluid or pressure to escape from thebody as the device is removed from the well, so that there is only a.limited pressure differential between the inside and outside of the bodywhen the device is removed from the well. When the device is loaded orfilled in the well under the head of iluid standing in the well, air orgas trapped in the upper portion of the bodyv A is under a highpressure, i. e., under a pressure corresponding to the pressure in thewell. As the tool is withdrawn from the well, the check valve D operatesto prevent escape of fluid from the body A, and therefore in the absenceof means for escape of pressure from the body, the body would be removedfrom the well, with its contents under pressure corresponding to that atwhich it was loaded in the well. The means E is in the nature of anescape opening 81 provided in the top section II of the body, and acontrol valve 88 normally closing the opening under the action of aspring 88. The valve 88 seats inwardly in the opening 81, and thereforeacts as a check valve, preventing the admission of fluid into the bodythrough the opening 81, and acts as an escape valve to allow fluid toescape from the body through the opening 81, when the pressure issuillcientto counteract the spring 88. The spring is held against thevalve` underv the desired pressure by a' tubular plug 98 threaded in theouter portion of the openthe device has been removed from the wellfilled with fluid or other material, the contents of the body are undera `certain pressure limited by the means F as above described. When theclosure 24 for the discharge opening I4 is removed, the pressure on thematerial in the body causes the material to immediately flow ordischarge through the opening I4, and under the initial impulse giventhe material by the pressure in the body A, the` entire contents of thebody tends to discharge through the opening I4 in one continuous ow oraction. In practice. this tendency is retarded or checked by the factthat as the material discharges from the body a reduced pressure isestablished in the body above the material therein, which tends to hold,if not completely retard, discharge of material from the body after acertain amount of ,material has. discharged from the body. y

The means F provided by our invention lis provided to allow free andcontinuous discharge of material from the body upon the closure 24 beingremoved from the opening I4. The means F in its preferred form includesan opening in the upper portion of the body, for instance in the bodysection Il, designed to admit fluid into the body under control of aplug and a check valve. In the particular construction illustrated, theopening 9| provided in the body section II is threaded and carries atting or mounting 92, which has an opening 93 through it controlled by aplug 94 and a valve 95. The plug 94 is threaded in -an enlargement 96 ofthe opening 93 at the outer end of the opening, and is provided with aninner end adapted to be positioned to close the opening 93. Suitableports or passages 91 are provided in the plug to allow freecommunication of pressure past the plug, and to the opening 93 when theplug has been backed out in the opening 96 so that the opening 93 isuncovered.

The valve 95 is in the nature of a ball check valve operating in asuitable cage 98, and urged by spring 99 to normally set outwardly toclose the opening 93. Suitable ports I connect the cage 99 to theinterior of the body A so that pressure admitted past the valve 95enters the body.

When the tool is being lowered into the well, the plug 94 is in positionor made tight so that it closes the opening 93. When the tool has beenoperated in the well and withdrawn therefrom, but before the closure 24is removed from the discharge opening I4, the plug 94 is loosened toadmit atmospheric pressure to the opening 93.'

Upon the closure 24 being removed from the opening I4, the material inthe body will flow out through the opening I4, and as soon as suflicientmaterial has discharged from the body to reduce the pressure within thebody so that it is less than that outside of the body, the valve 95 willopen admitting atmospheric pressure into the body above the materialtherein. The spring 99 is preferably made light and is merely to retainthe valve 95 in working position.

From the foregoing description, it is believed that the operation of thedevice will be fully understood. The structure is lowered into a Well tobe cleaned or bailed on a string of pipe or on a line, as the operatormay desire. The device is lowered into the well with the plug 94 madetight to close the opening 93, with the closure 24 in place in thedischarge opening I4, and a sealing disc in position in the carrier 45to cooperate with the seat 42. When the structure reaches the bottom ofthe well or an accumulation-of solid material in the well, the downwardmovement of the punch C is retarded so that relative movement occursbetween the body A and the punch C, resulting in the disc 43 beingruptured by the head I of the punch. Upon the disc 43 being ruptured,the hydrostatic head of iluid in the well being considerably greaterthan the pressure within the body A, there is a sudden and violent rushof material upwardly through the punch past the valve D, and into thebody A. When this filling action has ceased, the valve D seats andoperates to prevent discharge of any of the caught material from thedevice.

When the device has been operated it is then removed from the well,whereupon the operator may release the plug 94 and then remove theclosure 24 from the discharge opening I4. 'Ihe pressure under which thematerial is held in the body A causes it to discharge from the bodythrough the opening I4, and by reason of the admission of atmosphericpressure into the body A above the discharging material, the dischargingoperation continues when once started, resulting in effective andthorough discharging of the body. If for any reason it is found that thematerial has not thoroughly discharged from the body, the plug 94 may beremoved from the fitting 92 and a pressure line, such as a line carryingair or water, may be connected in place of the plug 94 so that fluidpressure is applied to the upper end of the body to flush material downthrough the body and out of the opening I4. To put the tool in conditionfor a second operation, the plug 94 is made tight, the closure 24isapplied to the opening I4, and the carrier 45 is removed from the bodyand then replaced, bearing or carrying a new closure disc 43. It will beobvious that these operations are all simple, and such that they can beperformed rapidly and without complicated or ungainly operations.

Having described only a typical form and application of the invention,we do not Wish to limit ourselves to the particular details hereinaboveset forth, but wish to reserve to ourselves changes or modificationsthat may occur to those skilled in the art, and which may fall withinthe scope oi. the following claims.

Having described our invention, we claim:

l. A well tool of the character described including, a tubular bodyclosed at its upper end, a closure for the lower end of the body, meansfor operating the closure, the body having a lateral discharge openingabove the closure and a seat at the outer end of the opening, a plugclosure for the opening and adapted to engage the seat, and means forholding the last mentioned closure in position at the opening, includingspaced lugs on the body engaging projections on said last mentionedclosure.

2. A well tool of the character described including, a tubular bodyclosed at its upper end, a closure for the lower end of the body, meansfor operating the closure, the body having a. lateral discharge openingabove the closure and a seat at the outer end of the opening, a plugclosure for the openingand adapted to engage the seat, and means forholding the last mentioned closure in position at the opening, includingdiametrically opposite lugs arranged in line longitudinally of the tooland diametrically opposite ears on the last mentioned closure engaged bythe lugs.

3. A well tool of the character described including, a tubular bodyclosed at its upper end, a closure for the lower end of the body, meansfor operating the closure, the body having a lateral discharge openingand a seat at the outer end of the opening, a closure for the openingand adapted to engage the seat, and means for holding the last mentionedclosure in position at the opening, including diametrically oppositelugs arranged inline longitudinally of the tool and diametricallyopposite ears on the last mentioned closure engaged by the lugs, theouter portion oi' said last mentioned closure being shaped to conform toand be ilush with the exterior of the body when the ears are engaged bythe lugs.

4. A well tool of the character described including, a tubular bodyclosed at its upper end, a

closure for the lower end of the body, means for operating the closure,thebody having a lateral .discharge opening, the bore of the body beingholding the last mentioned closure in position at the opening:

5. A well tool of the character described including, a tubular bodyclosed at its upper end, a closure for the lower end of the body, anupwardly opening check valve in the body above the closure, and meanscarried by the body for operating the closure including, a punch havinga tubular stem slidably carried by the body and a head on the stem toengage the closure, the lower end of the stem bore being open towell-fluid, and the upper end of the stem bore being adapted to open tothe body bore when the closure is opened.

6. A well tool of the character described including, a tubular bodyhaving an opening at its opening at the upper end of the body preventingflow outwardly through said opening, and operable to allow flow inwardlythrough said opening.

1. A. well tool of the character described including, a tubular bodyhaving an opening at its upper end and a transverse opening at its lowerend, a seat in thevbody at the transverse opening, a frangible sealingdisc for the lower end of the bodyito cooperate with the seat, a carrierfor the disc adapted to be arranged in the lateral .opening in the bodyto hold the-disc in position to cooperate with the seat, a check Valvein the lower part of the body to prevent discharge from the body, alateral discharge opening in the. body including a normally closed checkvalve above the check 'valve, a closure for the dischar'ge opening,means for holding said closure in position at the discharge opening,including lugs on the body cooperating with projections on the closure,means for breaking the sealing disc, including a punch having a stemprojecting downwardly below the body and shiftable longitudinallyrelative to the body, and a head at the upper end of the stem forengaging the disc, and a control for the opening at the upper end of.the body, including a check valve for preventing flow outwardly throughthe body and a screw threaded plug arranged in position from theexterior of the body, and adapted to close the opening.

8. In a well tool of the character described, a tubular body memberratransverse opening from the exterior of the body member to the borethereof, a carrier movable through said opening across the body memberbore and supported against vdisplacement axially of the body member bydefining walls Aof the opening, and a frangible closure mounted on saidcarrier and positioned within the'body member bore when the carrier isacross said bore.

9. In a tool of. the character described, a tubular body member,a'downwardly facing seat in the bore, a transverse opening in the wallof the body member, and a closure member for the bore movable thereintothrough said opening and onto said seat, and means in said opening andengaging the closure to hold it against said seat.

il). In a tool of the character described, a body member having achamber therein, a relief valve at the upper end of the chamber openingto the exterior of the body, a frangible closure for the lower end ofthe chamber, means for breaking said closure and an upwardly openingcheck valve in the chamber between said relief valve and said closure.

11. In a tool of the character described, a body member having a chambertherein, a relief valve at the upper end of the chamber openingv to theexterior of the body, a frangible closure for the lower end of thechamber, means for breaking said closure, an upwardly opening checkvalve in the chamber between said relief. valve and said closure, and adump valve for the chamber at a point above said check valve.

12. In a tool of the character described, a body member having a chambertherein, a relief valve at the upper end of the chamber opening to theexterior of the body, a closure for the lower end of the chamber, meansfor opening said closure, and an upwardly .opening check valve in the`chamber between said relief valve and said cloa hollow body, therebeing a transverse opening through the body Wall, an insertable closurefor the body-bore near the bottom thereof, and means for mounting theclosure in operative position, including a carrier for the closurepositioned in said opening.

l5. In a well tool of the character described, a hollow body, therebeing a transverse opening through the body wall, a seat in thebody-bore adjacent the opening, an [insertable closure for the body-boreat said seat, and a carrier for the closure adapted to be positioned insaid opening with the closure in cooperating relation with said seat.

16. A well tool of the character described, including a tubular bodyclosed at its upper end, a closure for the lowerend of' the body, meansfor operating the closure, the body having a lateral discharge openingand a seat at the outer end of the opening, there being a transverse wayformed in the body, a closure for the opening embodying a plug portion,a flange portion, and

a projecting portion, said projecting portion being slidable through.said way, said` plug portion being enterable in the opening and theflange being engageable with said seat while said projecting portion isentered in said way.

17. A well tool of the character described, in-

cluding a tubular body closed at its upper end, a

closure for the lower end of the body, means for operating the closure,the body having a lateral discharge opening and a seat at the outer endof the opening, there being a transverse way formed in the body adjacentthe opening, and a closure for the' opening, said last mentioned closurebeing movable through the way into and out of registration with theopening and being movable radially with respect to the body axis when insuch registration.

WELDON C. ERWIN.

CECIL H.'y SWEET.

CERTIFICATE OF CORRECTION.

Patent No. 2,659,629.. November 3, 1936.

WELDON C. ERWIN, ET AL.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 4,second column, lines 32 and 43, claims 1 and 2, strike out the Words"above the c1osure"; page 5, first column,l lines 27 and 28, claim 6,for "operable to allow" read a releasable closure for preventing; lines40 and 41, claim '7,

strike out the words "including a normally closed check valve" andinsert the same after "body" in line 26, claim 6; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

.Signed and sealed this 23rd day of February, A. D. 1937.

Henry Van ArSdale (Seal) Acting Commissioner of Patents.

